<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Sample Table</title>
</head>
<body>
    <section>
        <article>
            <table border="1">
                <tbody>
                    <tr>
                        <th colspan="3">Title goes here</th>
                        <td>A</td>
                        <td>B</td>
                    </tr>
                    <tr>
                        <td rowspan="3">C</td>
                        <td>D</td>
                        <td>E</td>
                        <td>F</td>
                        <td>G</td>
                    </tr>
                    <tr>
                        <td>H</td>
                        <td colspan="2">I</td>
                        <td rowspan="2">J</td>
                    </tr>
                    <tr>
                        <td>K</td>
                        <td>L</td>
                        <td>M</td>
                    </tr>
                    <tr>
                        <td>N</td>
                        <td colspan="4">O</td>
                    </tr>
                </tbody>
            </table>
        </article>
    </section>
</body>
</html>